diff --git a/lib/ai_bot/tools/db_schema.rb b/lib/ai_bot/tools/db_schema.rb
index 7359260f..4d19d35a 100644
--- a/lib/ai_bot/tools/db_schema.rb
+++ b/lib/ai_bot/tools/db_schema.rb
@@ -54,7 +54,7 @@ module DiscourseAi
         protected
 
         def description_args
-          { tables: tables.join(", ") }
+          { tables: tables }
         end
       end
     end